TITLE:   GCN CIRCULAR
NUMBER:  15488
SUBJECT: GRB 131110A: Swift-XRT and UVOT upper limits
DATE:    13/11/15 15:29:45 GMT
FROM:    Kim Page at U.of Leicester  <klp5@leicester.ac.uk>

K.L. Page, P.A. Evans (U. Leicester) and N.P.M. Kuin (UCL-MSSL) report on
behalf of the Swift-XRT and UVOT teams:

The Swift-XRT began observing the field of GRB 131011A 397 ks after the
event (Cummings & Palmer, GCN Circ. 15483). In 2.8 ks of Photon Counting
(PC)  mode data, no source was found in the BAT error circle; the 3-sigma
upper limit (0.3-10 keV) is 3.6e-3 count s^-1

The Swift-UVOT also began observations of the field of GRB 131110A at the
same time. No optical afterglow was found in the image. Preliminary
3-sigma upper limits using the UVOT photometric system (Breeveld et al.
2011, AIP Conf. Proc. 1358, 373) for the  initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white           397556       409058         892          >20.2
v               398095       409489         938          >18.6
u               397018       408678         892          >19.2

This circular is an official product of the Swift team.